We all know health is the most important in our life and we know smoking is bad for people's health. But not many people know about the danger of second-hand smoke (二手烟).
Second-hand smoke is the smoke that comes from the smoker's breath. If people get second-hand smoke from time to time, they could get ill from it. It can make people get lung cancer (肺癌) and many other illnesses more easily.
But how bad is the problem of the second-hand smoke? The World Health Organization（WHO）did a study of 194 countries. They found that about 600, 000 people die every year because of second-hand smoke. It makes a lot of problems.
Second-hand smoke is especially (尤其) bad for children because their bodies are growing. The study also shows that around 165, 000 children under 5 die each year because of second-hand smoke. Most of these children are from Africa and Southern Asia where health care is very poor.
You can do something to keep yourself and other people away from second-hand smoke. You can ask the smokers, such as your parents, to smoke outside. And if someone smokes close to you, you'd better hold your breath or just walk away.
